contestada

The area of a rectangle is 54 square feet. The height is three more than twice the width. Find
the width of the rectangle.

Respuesta :

lindsaycarballo57

Answer:

4.5 ft

Step-by-step explanation:

Let length = 2x + 3

Let width = x

Area = 54 ft2

 

 

length × width = Area

 

x(2x + 3) = 54

2x2 + 3x = 54

2x2 + 3x - 54 = 0

(2x - 9)(x + 6) = 0

 

x = 9/2    and    x = -6

x = 4.5    and    x = -6

 

We accept x = 4.5 because length cannot be a negative value.  Substituting this value into the dimensions:

 

width = 4.5 ft

length = 2(4.5) + 3 = 9 + 3 = 12 ft